ICD-10 Code K31.A29 – Gastric intestinal metaplasia with dysplasia, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K31.A29 – Gastric intestinal metaplasia with dysplasia, unspecified
What it is
This code identifies gastric intestinal metaplasia in the stomach with dysplastic change, but the record does not specify the grade or site. It reflects a precancerous mucosal abnormality documented by the clinician or pathology report.
Clinical signs
Clinical features vary; refer to documentation. Diagnosis is usually based on endoscopic biopsy showing intestinal-type epithelium in the stomach with dysplasia.
When to use this code
Use K31.A29 when the provider documents gastric intestinal metaplasia with dysplasia and does not specify a more precise category. It may appear in pathology follow-up, surveillance endoscopy, or evaluation of premalignant gastric lesions. Check documentation if the report names a different site or grade.
Do not use for
Do not use this code for gastric intestinal metaplasia without dysplasia, or for dysplasia documented in a different organ. If the record is unclear about the presence of dysplasia, check documentation.
Coding tip
Code only when dysplasia is explicitly documented; unspecified wording should not be inferred from metaplasia alone.